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The AHP6 cytokinin signaling inhibitor mediates an auxin-cytokinin crosstalk that regulates the timing of organ initiation at the shoot apical meristem
- Source :
- Plant Signaling and Behavior, Plant Signaling and Behavior, Taylor & Francis, 2014, 9 (4), ⟨10.4161/psb.28788⟩, Plant Signaling and Behavior, 2014, 9 (4), ⟨10.4161/psb.28788⟩, Plant Signaling and Behavior 4 (9), . (2014)
- Publication Year :
- 2014
- Publisher :
- HAL CCSD, 2014.
-
Abstract
- Phyllotaxis, the spatio-temporal pattern of organogenesis at the shoot apical meristem, emerges in large part from inhibitory fields consisting in auxin-depleted areas centered on organs. We recently demonstrated the existence of an additional hormone-based inhibitory field generated by Arabidopsis Histidine Phosphotransfer Protein 6 (AHP6), an inhibitor of cytokinin signaling. We have shown that the spatio-temporal distribution of AHP6 in the meristem is essential for optimizing the rhythmicity of organ initiation. Here, we further analyzed AHP6 expression using fluorescent whole mount mRNA in situ hybridization and demonstrate a precise control of AHP6 level and expression domain over time. While we previously showed a regulation of AHP6 directly downstream of auxin, we show here that AHP6 transcription is unlikely influenced by cytokinin distribution in the meristem. Finally, we provide evidence that cytokinins and auxin might act synergistically during organ initiation, providing a plausible explanation for how AHP6 regulates phyllotaxis.
- Subjects :
- 0106 biological sciences
Short Communication
régulateur du développement des plantes
[SDV]Life Sciences [q-bio]
Organogenesis
Plant Science
Biology
01 natural sciences
03 medical and health sciences
chemistry.chemical_compound
cytokinin
phyllotaxis
Transcription (biology)
Auxin
Arabidopsis
Botany
apical meristems
méristème apical
phyllotaxie
030304 developmental biology
chemistry.chemical_classification
shoot apical meristem
0303 health sciences
patterning
cytokinine
auxine
fungi
food and beverages
Phyllotaxis
Meristem
biology.organism_classification
Cell biology
Crosstalk (biology)
chemistry
auxin
plant development
Cytokinin
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 15592316 and 15592324
- Database :
- OpenAIRE
- Journal :
- Plant Signaling and Behavior, Plant Signaling and Behavior, Taylor & Francis, 2014, 9 (4), ⟨10.4161/psb.28788⟩, Plant Signaling and Behavior, 2014, 9 (4), ⟨10.4161/psb.28788⟩, Plant Signaling and Behavior 4 (9), . (2014)
- Accession number :
- edsair.doi.dedup.....5c38ebe39c36fd1ca6397b78aaa5b30c